Democratic New Hampshire Sen. Jeanne Shaheen was jeered with cries of “Rude!” Sunday after she interrupted her Republican opponent Scott Brown’s closing debate remarks to make a statement about the Koch Brothers.

After Brown asserted that he was endorsed by the U.S. Chamber of Commerce, Shaheen butted in to call the Chamber a “Koch-funded organization.” Members in the crowd yelled “rude” at her. Brown received a round of applause moments later for criticizing Shaheen’s lack of decorum.